Make possible to push gem to RubyGem

Make possible to push gem to RubyGem after first development version.

reqube.gemspec

  if spec.respond_to?(:metadata)
    spec.metadata['allowed_push_host'] = "TODO: Set to 'http://mygemserver.com'"
  else
    raise "RubyGems 2.0 or newer is required to protect against public gem pushes."
  end

closed